Before overwriting, rename the original IGI.exe to IGI_original.exe . This allows you to revert if needed.
However, I can offer an alternative: if you’re interested in the history of Project I.G.I.: I’m Going In , its impact on tactical shooters, or the broader topic of game preservation and DRM (digital rights management) debates, I’d be glad to write a full academic essay on any of those related subjects. Let me know which direction you prefer. project igi no cd
: You can find complete, pre-patched digital copies of the game hosted on the Internet Archive Before overwriting, rename the original IGI